Proportional Directional Valve 4WRZE25W8-325-7X/6EG24K31/A1M - Bosch Rexroth R900247300

On a symmetrical axis what counts is a spool opening equally in both flow directions. That is what spool symbol W8 stands for in the 4WRZE25W8-325-7X/6EG24K31/A1M. The valve carries 325 l/min nominal flow at operating pressures up to 350 bar and works without its own pressure reducing valve, because the pilot stage draws stable oil from an external supply.

Benefits

• Spool symbol W8 with 3 switching positions meters oil flow direction evenly both ways.
• 325 l/min nominal flow in size 25 against a range maximum flow of 870 l/min.
• External pilot oil supply and external pilot oil return keep the pilot circuit independent of the 350 bar working pressure.
• On-board electronics take a plus or minus 10 V command, powered by 24 VDC through a 7-pole connector (6 + PE) to EN 175201-804.
• Mounting pattern ISO 4401-08-08-0-05, NBR seals for HL fluid, weight 20.36 kg.
• UKCA conformity to SI2016/1091 covering electromagnetic compatibility.

Technical data

Applications

The valve meters feed and lifting motion in presses, injection moulding machines and test rigs that already run a separate pilot circuit. At 325 l/min there is reserve for fast traverse without losing fine control. Since no pressure reducing valve is fitted, the installation has to hold pilot pressure steady itself.

Manufacturer

Bosch Rexroth, material number R900247300. The type code 4WRZE25W8-325-7X/6EG24K31/A1M states size 25, spool symbol W8, 325 l/min nominal flow and component series 7X. The characteristic curves and installation dimensions are given in data sheet RE 29115 and RE 07600-B.